Krusader is for KDE Plasma and other desktops in the *nix world, similar to Midnight or Total Commander. It provides all the file management features you could possibly want. Directory synchronisation; File content comparisons; batch renaming.
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Has everything you might wish for and more.
Pro Root mode
Dangerous but sometimes useful.
Pro Advanced renamer
Via package krename.
Pro Archive support
Browse archives as folders.
Pro Multiple tabs
Tabs with other listings, and options to move the tab to the other side.
Pro Directory compare
Compare 2 directories on content or file/date and sync them.